【摘要】 本文研究了TC11钛合金在氩气和空气环境中的微动磨损特性及其与主要试验参量(正压力、振动幅度与频率)的关系。同时,根据X射线衍射、能谱分析、离子探针及扫描电镜观察结果对TC11-TC11及TC11-GCr15摩擦副之间的微动磨损机理进行了较深入的探讨。结果表明,微动磨损随振幅及频率的增加而加剧。氩气中的微动磨损过程由两个阶段构成,即初期的粘着和后期的疲劳损伤,后者是由于作用在基体金属表层的交变剪切应力造成的。对于空气中的微动磨损,金属转移及脱层起着更为重要的作用。更多还原

【Abstract】 Fretting wear chracteristics of TC11 titanium alloy in argon and air, and its relations with main experimental parameters(such as normal load, amplitude of slip and frequency of vibration)have been studied. Fretting mechanism of TC11-TC11 and TC11-GCr15 friction couples was also discussed with techniques of XRay diffraction, energy spectrum, SEM and ion probe. The experimental results showed that fretting wear was aggregated with increasing amplitude and frequency of vibration. Fretting wear process in argon was compossed mainly of two stage, i.e initial adhesion and latter fatigue damage caused by alternative shear stress at the sub-surface of the lmaterial. Meta transfer phenomenon and delamilation plaied a more important role in fretting wear in air for TC11-GCr15 friction couples.更多还原